音标：[,ʌn'nesәsәri]
a. 不必要的
在线英汉词典

unnecessary的短语、例句：

unnecessary adj (a) [usu pred 通常作表语] not necessary or desirable; superfluous 不需要; 不必要; 多余
It´s unnecessary to cooka big meal tonight. 今晚不必做很多饭. (b) [usu attrib通常作定语] more than necessary; excessive 超过需要的; 过度的
unnecessary expense 多余的开销. (c) (of remarks, etc) not required in a situation and likely to be offensive; gratuitous （指言语等）无必要而可能得罪人的, 没来由的
an unnecessary reference to his criminal past 何必提到他的前科.